httpd-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Joshua Slive <>
Subject Re: [users@httpd] RewriteMap prg vs cgi performance
Date Thu, 25 Aug 2005 23:47:40 GMT
On 8/25/05, allan juul <> wrote:
> hello,
> i'm in doubt whether to use a perl cgi script or a perl program via
> mod_rewrite because of performance.
> the actual processing is handling a client certificate and some xml and
> returning a base64-encoded string. processing takes less than a second
> but let's say it takes exactly one second
> if the site gets 10 simultaneously requests for a cgi it will start 10
> perl interpreters (i guess) and all requests should be handled within a
> second.
> but what happens if the site gets 10 simultaneously requests for a URI
> that is handled by a perl program via mod_rewrite? like:
>   RewriteMap
> i know theres only one perl interpreter started at server startup and it
> listens on STDIN - but does that mean it will handle the 10 request one
> by one? i mean, in this example it would appear to take 10 seconds for
> the last request?

Yes.  The requests are serialized (see the RewriteLock directive).

CGI is the safer alternative because it runs as the less-priveleged
user and a problem in one request won't hurt another request.  It may
or may not be faster than the RewriteMap depending on exactly what
resources are acting as constraints.


The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:> for more info.
To unsubscribe, e-mail:
   "   from the digest:
For additional commands, e-mail:

View raw message